基于振动台试验的预制再生混凝土框架后浇边节点分析
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摘要
通过振动台试验对预制再生混凝土框架不同楼层处的后浇边节点进行了抗震性能分析,对其破坏形态、滞回性能、延性特征、刚度退化等进行了研究,为采用后浇节点的预制再生混凝土结构的工程应用提供试验依据和理论基础,并对后浇节点的新旧混凝土叠合面这一薄弱环节提出了加强后浇节点抗震构造的设计建议。研究结果表明:再生混凝土后浇边节点破坏过程与普通混凝土边节点十分类似,可分为初裂阶段、通裂阶段、极限阶段、破坏阶段;再生混凝土边节点的延性等抗震性能仍满足相应抗震设防要求;再生混凝土框架边节点的抗剪承载力,可采用现行《混凝土结构设计规范》中节点抗剪承载力修正后的公式计算。
The shaking table test was carried out for cast-in-situ exterior joints in different floors of a precast frame made of recycled aggregate concrete(RAC).The failure feature,the hysteretic behavior,the ductility characteristic and stiffness degradation under seismic waves were comparatively investigated,for the purpose of providing experimental and theoretical background of cast-in-situ joint in RAC structures.At last,some construction design recommendations were put forward to the weak surface between new and old concrete in the cast-in-situ joint.The research results show that failure process of cast-in-situ exterior joints with RAC is similar to that of conventional concrete,which can be divided into four stages:the initial cracking stage,the fully cracking stage,the ultimate stage and the failure stage.The seismic behaviors of exterior joints of RAC,including the ductility etc.,still meet the related requirements of earthquakeresistance design.The formula for calculating the shear capacity of exterior joints made of RAC is proposed and compared with the calculation formula in current Chinese Code for Design of Concrete Structures.
The shaking table test was carried out for cast-in-situ exterior joints in different floors of a precast frame made of recycled aggregate concrete(RAC).The failure feature,the hysteretic behavior,the ductility characteristic and stiffness degradation under seismic waves were comparatively investigated,for the purpose of providing experimental and theoretical background of cast-in-situ joint in RAC structures.At last,some construction design recommendations were put forward to the weak surface between new and old concrete in the cast-in-situ joint.The research results show that failure process of cast-in-situ exterior joints with RAC is similar to that of conventional concrete,which can be divided into four stages:the initial cracking stage,the fully cracking stage,the ultimate stage and the failure stage.The seismic behaviors of exterior joints of RAC,including the ductility etc.,still meet the related requirements of earthquakeresistance design.The formula for calculating the shear capacity of exterior joints made of RAC is proposed and compared with the calculation formula in current Chinese Code for Design of Concrete Structures.
引文
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[5]肖建庄,朱晓晖.再生混凝土框架节点抗震性能研究[J].同济大学学报:自然科学版,2005,33(4):436-440.XIAO Jian-zhuang,ZHU Xiao-hui.Study on Seismic Behaviour of Recycled Concrete Frame Joints[J].Journal of Tongji University:Natural Science,2005,33(4):436-440.
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[9]张敏政.地震模拟实验中相似律应用的若干问题[J].地震工程与工程振动,1997,17(2):52-58.ZHANG Min-zheng.Study on Similitude Laws for Shaking Table Tests[J].Journal of Earthquake Engineering and Engineering Vibration,1997,17(2):52-58.
[10]JGJ 55—2011,普通混凝土配合比设计规程[S].JGJ 55—2011,Specification for Mix Proportion Design of Ordinary Concrete[S].
[11]GB 50010—2010,混凝土结构设计规范[S].GB 50010—2010,Code for Design of Concrete Structures[S].
[12]GB 50011—2010,建筑抗震设计规范[S].GB 50011—2010,Code for Seismic Design of Buildings[S].
[13]黄志诚.混凝土后浇框架节点的抗震性能研究[D].南京:东南大学,2005.HUANG Zhi-cheng.Study of Seismic Behavior for R.C Frame Post-cast Joint[D].Nanjing:Southeast University,2005.
[14]XIAO J Z,WANG C Q,LI J.et al.,Shake-table Model Tests on Recycled Aggregate Concrete Frame Structure[J].ACI Structural Journal,2012,109(6):777-786.
[15]朱伯龙.建筑抗震试验[M].北京:地震出版社,1989.ZHU Bo-long.Building Earthquake Resistant Test[M].Beijing:Seismological Press,1989.
[16]陈适才,闫维明,李振宝,等.大型预制混凝土梁柱叠合板中节点整体抗震性能试验研究[J].工程力学,2012,29(2):135-141.CHEN Shi-cai,YAN Wei-ming,LI Zhen-bao,et al.Experimental Study on Seismic Behavior of Layered Slab and Beam to Column Interior Joints in Precast Concrete Structures[J].Engineering Mechanics,2012,29(2):135-141.
[17]肖建庄.再生混凝土[M].北京:中国建筑工业出版社,2008.XIAO Jian-zhuang.Recycled Concrete[M].Beijing:China Architecture&Building Press,2008.
[2]RESREEPO J I,PARK R,BUCHANAN A H.Design of Connections of Earthquake Resisting Precast Reinforced Concrete Perimeter Frames[J].PCI Journal,1995,40(5):68-80.
[3]赵斌,吕西林,刘海峰.预制高强混凝土结构后浇整体式梁柱组合件抗震性能试验研究[J].建筑结构学报,2004,25(6):22-28.ZHAO Bin,LU Xi-lin,LIU Hai-feng.Experimental Study on Seismic Behavior of Precast Concrete Beamcolumn Subassemblage with Cast-in-situ Monolithic Joint[J].Journal of Building Structures,2004,25(6):22-28.
[4]ZHANG J C,LI N,JI L.Experimental Study on Seismic Behavior of Pre-cast Concrete Structure with Cast-in-situ Integral Beam-column Joint Sub-assemblage[J].Applied Mechanics and Materials,2011,71-78:506-509.
[5]肖建庄,朱晓晖.再生混凝土框架节点抗震性能研究[J].同济大学学报:自然科学版,2005,33(4):436-440.XIAO Jian-zhuang,ZHU Xiao-hui.Study on Seismic Behaviour of Recycled Concrete Frame Joints[J].Journal of Tongji University:Natural Science,2005,33(4):436-440.
[6]BAI G L,LIU C,JIA S W,et al.Study on Seismic Behavior of Recycled Concrete Frame Joints Under Low Cyclic Load[C]//XIAO J Z,ZHANG Y,CHEUNG M S,et al.Proceedings of the 2nd International Conference on Waste Engineering and Management.Shanghai:Curran Associates Inc,2011:638-644.
[7]XIAO J Z,TAWANA M M,WANG P J.Test on the Seismic Performance of Frame Joints with Pre-cast Recycled Concrete Beams and Columns[C]//XIAO J Z,ZHANG Y,CHEUNG M S,et al.Proceedings of the 2nd International Conference on Waste Engineering and Management.Shanghai:Curran Associates Inc,2011:773-786.
[8]CORINALDESI V,LETELIER V,MORICONI G.Behaviour of Beam-column Joints Made of Recycledaggregate Concrete Under Cyclic Loading[J].Construction and Building Materials,2011,25(4):1877-1882.
[9]张敏政.地震模拟实验中相似律应用的若干问题[J].地震工程与工程振动,1997,17(2):52-58.ZHANG Min-zheng.Study on Similitude Laws for Shaking Table Tests[J].Journal of Earthquake Engineering and Engineering Vibration,1997,17(2):52-58.
[10]JGJ 55—2011,普通混凝土配合比设计规程[S].JGJ 55—2011,Specification for Mix Proportion Design of Ordinary Concrete[S].
[11]GB 50010—2010,混凝土结构设计规范[S].GB 50010—2010,Code for Design of Concrete Structures[S].
[12]GB 50011—2010,建筑抗震设计规范[S].GB 50011—2010,Code for Seismic Design of Buildings[S].
[13]黄志诚.混凝土后浇框架节点的抗震性能研究[D].南京:东南大学,2005.HUANG Zhi-cheng.Study of Seismic Behavior for R.C Frame Post-cast Joint[D].Nanjing:Southeast University,2005.
[14]XIAO J Z,WANG C Q,LI J.et al.,Shake-table Model Tests on Recycled Aggregate Concrete Frame Structure[J].ACI Structural Journal,2012,109(6):777-786.
[15]朱伯龙.建筑抗震试验[M].北京:地震出版社,1989.ZHU Bo-long.Building Earthquake Resistant Test[M].Beijing:Seismological Press,1989.
[16]陈适才,闫维明,李振宝,等.大型预制混凝土梁柱叠合板中节点整体抗震性能试验研究[J].工程力学,2012,29(2):135-141.CHEN Shi-cai,YAN Wei-ming,LI Zhen-bao,et al.Experimental Study on Seismic Behavior of Layered Slab and Beam to Column Interior Joints in Precast Concrete Structures[J].Engineering Mechanics,2012,29(2):135-141.
[17]肖建庄.再生混凝土[M].北京:中国建筑工业出版社,2008.XIAO Jian-zhuang.Recycled Concrete[M].Beijing:China Architecture&Building Press,2008.
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